JPH11131995A - Cut-off sheet for tunnel lining and fixing auxiliary tool therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify a manufacturing process for a cut-off sheet by a method wherein nonwoven fabric is partially adhered to a soft strip resin sheet, a plurality of the nonwoven fabrics is juxtaposed in the direction of the width of a resin sheet on the back of a resin sheet, the edge parts of the adjoining cloths are overlapped together, the upper edge part of an overlapping part forms an intermediate fixing part. SOLUTION: A cut-off sheet 1 for tunnel lining comprises a soft strip resin sheet 2, and two nonwoven fabrics 3 and 3a arranged in juxtaposition on the back of the resin sheet 2. The edge parts of the outside of the nonwoven fabrics 3 and 3a are positioned inside the two side edge parts of the resin sheet 2 and inside end parts are overlapped with each other. The nonwoven fabrics are adhered together for integral formation by a plurality of trains of adhesions linearly partially in the longitudinal direction of the resin sheet 2, and the outside end parts of the nonwoven fabrics 3 and 3a are brought into a state to separate from the resin sheet 2 and form fixing parts 5 and 5a to a primary lining section. The inner edge part of one nonwoven fabric 3 in a state to be overlapped with the inner edge part of the other nonwoven fabric 3a forms an intermediate fixing part 6 to the primary lining surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproofing sheet for tunnel lining, which is spread on a primary lining surface of a tunnel, and an auxiliary device for fixing the same.

[0002]

2. Description of the Related Art In a conventional waterproof sheet for tunnel lining, a method of spraying concrete on a ground and extending in a circumferential direction of a primary lining surface is sequentially repeated toward a deep side of the tunnel. To cover the entire wall,
Secondary lining concrete is cast on top of this to build the inner wall of the tunnel. As the water-stop sheet, there is a sheet described in Japanese Utility Model Publication No. 5-10077, which was distributed before the present application, and this is a tunnel cover made of a waterproof sheet and a non-woven fabric stuck thereto under point bonding. A multi-layer waterproof sheet for construction, comprising a middle stop piece attached to a central region of only the non-woven fabric extending parallel to or spaced apart from a side edge thereof. The waterproof sheet is a multi-layered waterproof sheet, the waterproof sheet is stretched in the circumferential direction of the tunnel, both sides of the nonwoven fabric and the intermediate stopper are nailed to the primary lining surface, and the side edge of the adjacent preventing sheet is provided. The parts were welded together by polymerization or crimping, so that they could easily fit into the unevenness of the ground of the tunnel.

[0003]

However, in the above waterproof sheet, since the nonwoven fabric and the intermediate stopper are separate bodies,
There were problems such as a complicated manufacturing process.

[0004]

SUMMARY OF THE INVENTION The present invention relates to a multilayer water-stop sheet in which a non-woven fabric is partially adhered to a soft belt-shaped resin sheet. In parallel with the direction, while polymerizing the edge of the adjacent non-woven fabric, the upper edge of the superposed portion as an intermediate fixing portion, so that a part of the non-woven fabric as an intermediate fixing portion, Solve the problem.

[0005]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 2, in a waterproof sheet 1 for tunnel lining, a soft strip-shaped resin sheet 2 is used.
And two nonwoven fabrics 3, 3a,... Arranged in parallel on the back surface of the resin sheet 2. Also, the outer edges of the nonwoven fabrics 3, 3a,... Are located inside the two side edges of the resin sheet 2 and the inner edges are superposed. The nonwoven fabrics 3, 3a... Are applied to the resin sheet 2 linearly and partially in the longitudinal direction of the resin sheet 2 in a plurality of rows of the bonding portions 4, 4a.
Are bonded and integrated, and the outer ends of the nonwoven fabrics 3, 3a... Are separated from the resin sheet 2 to form the fixing portions 5, 5a to the primary lining surface A. Also, one nonwoven fabric 3 in an overlapping state is placed on the inner edge of the other nonwoven fabric 3a.
Is formed as an intermediate fixing portion 6 to the primary lining surface A. Also, the resin sheet 2 which is in a free state with respect to the non-woven fabrics 3, 3a.
Are formed as welded portions 7, 7a of the adjacent waterproof sheet 1 for tunnel lining with the resin sheet 2.

The waterproof sheet 1 for tunnel lining in the above embodiment is composed of one resin sheet 2 and two nonwoven fabrics 3, 3a... As shown in FIG. .. Are formed of one resin sheet 2 and three nonwoven fabrics 3, 3a to form two intermediate fixing portions 6, 6a. In short, a plurality of nonwoven fabrics 3, 3a. .. May be partially adhered to the resin sheet 2 by polymerization. Also, the form of the bonding portions 4, 4a... Does not have to be linear, and although not shown, may be dot-like.

Further, the water-stop sheet 1 for adjoining tunnel lining
In the fixing aid 10 for fixing the fixing portions 5, 5a in the superposed state, a plurality of detachable tapes 12, 12a,...

Next, a method for applying the waterproof sheet 1 for tunnel lining will be described with reference to FIGS. 3 (a) to 3 (c). (1) While fixing the waterproofing sheet 1 for tunnel lining in the circumferential direction of the primary lining surface A, one fixing portion 5 and then the intermediate fixing portion 6 are fixed to the primary lining surface A, and the other fixing portion. 5a is temporarily fixed to the primary lining surface A. (2) One fixing portion 5 of the waterproof sheet for tunnel lining 1 to be fixed is overlapped on the fixing portion 5a of the fixed waterproof sheet for tunnel lining 1, and the overlapping portion, and then the intermediate fixing portion. 6 to the primary lining surface A and the other fixing portion 5a
Is temporarily fixed to the primary lining surface A. (3) By repeating (1) and (2), the front surface of the primary lining surface A is covered with the waterproof sheet 1 for tunnel lining. (4) Weld and weld the welded parts 7 and 7a of the adjacent waterproof sheet 1 for tunnel lining. In addition, as a fixing means to the primary lining surface A in (1) and (2), the fixing auxiliary tool 10 is attached to the corresponding portion, and the fixing auxiliary tool 10 is penetrated by the nails 14, 14 a. I try to drive it.

Next, the operation of the waterproof sheet for tunnel lining according to the present invention and the aid for fixing the same will be described. By fixing the waterproofing sheet 1 for tunnel lining not only at both ends but also at an intermediate portion, the interval between fixing portions of the waterproofing sheet 1 for tunnel lining to the primary lining surface A is reduced, and the primary lining surface A It is possible to expand the waterproof sheet 1 for tunnel lining corresponding to the unevenness of the tunnel. When the fixing aid 10 is applied to the fixing portions 5, 5a and the intermediate fixing portion 6, the restraining members of the detachable tapes 12, 12a are entangled with the fibers of the nonwoven fabrics 3, 3a, and the fixing portions 5, 5a. 5a
And, the fixing auxiliary tool 10 is attached to the intermediate fixing portion 6.

[0010]

In summary, the present invention is a multilayer water-stop sheet in which non-woven fabrics 3, 3a are partially adhered to a soft strip-shaped resin sheet 2, and a plurality of non-woven fabrics 3, 3a. .. Are arranged side by side in the width direction of the resin sheet 2, and the edges of the adjacent nonwoven fabrics 3, 3a... Are polymerized, and the upper edge of the superposed portion is the intermediate fixing portion 6. Since the waterproofing sheet for engineering work 1 can be fixed not only at both side edges but also at an intermediate part thereof, the waterproofing sheet for tunnel lining 1 can be extended along the unevenness of the primary lining surface A, and the intermediate waterproof part can be extended. Fixing part 6 for fixing the non-woven fabric 3, 3a
Since it is a part of, the resin sheet 2 and the nonwoven fabric 3
It can be easily manufactured by setting 3a ... and pressing it.

Further, since the detachable tapes 12, 12a... Are provided on the rear surface of the elongated base which is easily deformed, the fixing auxiliary tool 10 can be temporarily fixed to the nonwoven fabrics 3, 3a. The practical effect is remarkable, such as facilitation of nailing work.

[Brief description of the drawings]

FIG. 1 is a rear view of a waterproof sheet for tunnel lining according to the present invention.

FIG. 2 is a sectional view taken along line XX of FIG.

FIG. 3 is a stage diagram for explaining a construction process of a waterproof sheet for tunnel lining.

FIG. 4 is a sectional view of a waterproof sheet for tunnel lining having three nonwoven fabrics.

FIG. 5 is a rear view of the fixing aid with an intermediate portion omitted.

[Explanation of symbols]

 2 Resin sheet 3, 3a ... Non-woven fabric 6 Intermediate fixing part 12, 12a ... Removable tape

Claims (2)

[Claims] 1. A multilayer water-stop sheet comprising a soft band-shaped resin sheet and a non-woven fabric partially bonded to each other, wherein a plurality of non-woven fabrics are arranged in parallel on the back surface of the resin sheet in the width direction of the resin sheet. Characterized in that the edge portion of the watertight sheet is superposed, and the edge portion above the superposed portion is an intermediate fixing portion. 2. An auxiliary tool for fixing a waterproof sheet for tunnel lining, wherein a detachable tape is provided on the back surface of an easily deformable elongated substrate.